Good question. Would depend on weapon load out but I would say, from winner to loser, Elite > Brute > Hunter The Hunter is too slow, you can kill the thing just by running around and shooting it in the back with a standard weapon. The Brutes don't seem as disciplined or as deadly as the Elites either, plus the Elites move around from side to side all the time so even a Chieftain would have a hard time hammering one to death. Plus Elites have swords so once you get one of them out, anything is dead. Having said that if you put them all in a tiny room the Hunter will simply smack them both to death so it depends really. Even playing field, large area, Elites for sure.